Moving a magnet in and out of a coil will make the needle on a galvanometer...
Moving a magnet in and out of a coil will make the needle on a galvanometer move to each side.
a) explain what is happening in terms of magnetic induction.
b) what would it take to induce an emf that stays positive, or that stays negative? is it possible?
c) how can you get the largest possible deflection of the needle? explain what you do in terms of the magnetic field of the magnet, and the induced emf.
Homework Answers
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Moving a magnet in and out of a coil will make the needle on a
galvanometer...
Procedure: Take one of the coils and connect it to the galvanometer. Use the cylindrical magnet...
Procedure: Take one of the coils and connect it to the
galvanometer. Use the cylindrical magnet to generate a changing
magnetic field around the coil and note the reading of the
galvanometer as the field changes. Thrust the N pole of the magnet
into the coil and note the effect on the galvanometer. When the
needle has come to rest, withdraw the magnet as quickly as
possible. Note the effect on the direction of current flow. Reverse
the magnet and...
I. As shown below, a coil is in a magnetic field that is directed upward. If...
I. As shown below, a coil is in a magnetic field that is directed upward. If the magnitude of the magnetic field increases, in what direction does the induced current flow in the coil? Explain 2. Suppose you know that a deflection of the galvanometer needle to the right means that current is flowing into the galvanometer as indica ted A bar magnet is moved towards a coil as shown in the picture below. The galvanotneter needle deflects to the...
For this station, you have two coils of wire (each with different numbers of loops), a...
For this station, you have two coils of wire (each with different numbers of loops), a magnet, some connecting wires, and a galvanometer. A galvanometer is an ammeter that measures very small currents (micro-amperes) and indicates the direction of that current. Understanding how the meter behaves is important here, because you’re going to use the meter to determine/measure current—including its direction. For this galvanometer, when (conventional) current enters the terminal on the right (as viewed when reading the dial), the...
1. OBSERVATIONAL EXPERIMENT: HOW TO INDUCE A CURRENT IN A COIL NOT CONNECTED TO A BATTERY...
1. OBSERVATIONAL EXPERIMENT: HOW TO INDUCE A CURRENT IN A COIL NOT CONNECTED TO A BATTERY The goal of this experiment is to observe 2 sets of videos to find a pattern for the conditions under which there is a current through a coil of wire that is not connected to a battery. Available equipment: Computer with internet connection a) First, make sure you know what a galvanometer is. A galvanometer is a device that registers electric current through it....
What is the direction of the induced magnetic field in the coil when the bar magnet is moving...
A coil is suspended around an axis which is colinear with the axis of a bar magnet.The coil is connected to a resistor with ends labeled “a” and “b”. The bar magnet moves from left to right with North and South poles labeled as in the figure. UseLenz’s law to answer the following question concerning the direction of induced currents and magnetic fields.What is the direction of the induced magnetic field in the coil when the bar magnet ismoving from...
A bar magnet induces a current in an N-turn coil as the magnet moves closer to...
A bar magnet induces a current in an N-turn coil as the
magnet moves closer to it as shown in (Figure 1) . The coil's
radius is R m, and the average induced emf across the bulb
during the time interval is ? V.
A. Find the rate of change of magnetic field
Express your answer in terms of the variables
?,
N,
R, and appropriate
constants.
Part B
Determine the induced current. Assume that R0 is the
resistance of...
(c) A magnet moves down through a coil as shown in Figure 2. Figure 2 i. Sketch and explain what ...
(c) A magnet moves down through a coil as shown in Figure 2. Figure 2 i. Sketch and explain what the direction of the induced (2 marks) (2 marks) Explain what's need to be done in order to generate a (2 marks) (2 marks) current should be. ii. What would happen to the emf induced if the motion of the magnet is reversed. larger emf. iv. Would there be any emf induced if the magnet stops moving?
(c) A magnet...
1) Induced emf in a coil depends on a) Relative motion of magnet b) Relative motion...
1) Induced emf in a coil depends on a) Relative motion of magnet b) Relative motion of coil c) Both d) None 2) When is passed through coil is there magnet a a (changing/unchanging) magnetic flux through the coil that induces an electromotive force(emf) in the coil; the incoming flux is (equal /not equal)to the outgoing flux. 3) While a magnet is moved toward the end of a solenoid, a voltage difference is induced between the two ends of the...
V: olorado River Run h It (Generator In a generator, an outside source of mechanical motion...
V: olorado River Run h It (Generator In a generator, an outside source of mechanical motion supplies the energy to move a magnet in a magnetic field. A generator works just like the moving magnet in a magnetic field (as in Part II) .Click on Show Field and observe the moving magnetic field Changing Changing Summary Lenz's Law states that the induced EMF opposes the change in the magnetic field. Imagine you were actually turning the water wheel by hand...
In part III of the experiment, you will move a permanent magnet into a coil and...
In part III of the experiment, you will move a permanent magnet into a coil and measure the induced current (see Figure 29-2 in the book). If you find a positive current when you bring the north pole of the magnet closer, what do you expect to find when you pull the magnet back? a positive current. a negative current. Zero current.
Procedure: Take one of the coils and connect it to the
galvanometer. Use the cylindrical magnet to generate a changing
magnetic field around the coil and note the reading of the
galvanometer as the field changes. Thrust the N pole of the magnet
into the coil and note the effect on the galvanometer. When the
needle has come to rest, withdraw the magnet as quickly as
possible. Note the effect on the direction of current flow. Reverse
the magnet and...
I. As shown below, a coil is in a magnetic field that is directed upward. If the magnitude of the magnetic field increases, in what direction does the induced current flow in the coil? Explain 2. Suppose you know that a deflection of the galvanometer needle to the right means that current is flowing into the galvanometer as indica ted A bar magnet is moved towards a coil as shown in the picture below. The galvanotneter needle deflects to the...
1. OBSERVATIONAL EXPERIMENT: HOW TO INDUCE A CURRENT IN A COIL NOT CONNECTED TO A BATTERY The goal of this experiment is to observe 2 sets of videos to find a pattern for the conditions under which there is a current through a coil of wire that is not connected to a battery. Available equipment: Computer with internet connection a) First, make sure you know what a galvanometer is. A galvanometer is a device that registers electric current through it....
A bar magnet induces a current in an N-turn coil as the
magnet moves closer to it as shown in (Figure 1) . The coil's
radius is R m, and the average induced emf across the bulb
during the time interval is ? V.
A. Find the rate of change of magnetic field
Express your answer in terms of the variables
?,
N,
R, and appropriate
constants.
Part B
Determine the induced current. Assume that R0 is the
resistance of...
(c) A magnet moves down through a coil as shown in Figure 2. Figure 2 i. Sketch and explain what the direction of the induced (2 marks) (2 marks) Explain what's need to be done in order to generate a (2 marks) (2 marks) current should be. ii. What would happen to the emf induced if the motion of the magnet is reversed. larger emf. iv. Would there be any emf induced if the magnet stops moving?
(c) A magnet...
1) Induced emf in a coil depends on a) Relative motion of magnet b) Relative motion of coil c) Both d) None 2) When is passed through coil is there magnet a a (changing/unchanging) magnetic flux through the coil that induces an electromotive force(emf) in the coil; the incoming flux is (equal /not equal)to the outgoing flux. 3) While a magnet is moved toward the end of a solenoid, a voltage difference is induced between the two ends of the...
V: olorado River Run h It (Generator In a generator, an outside source of mechanical motion supplies the energy to move a magnet in a magnetic field. A generator works just like the moving magnet in a magnetic field (as in Part II) .Click on Show Field and observe the moving magnetic field Changing Changing Summary Lenz's Law states that the induced EMF opposes the change in the magnetic field. Imagine you were actually turning the water wheel by hand...
In part III of the experiment, you will move a permanent magnet into a coil and measure the induced current (see Figure 29-2 in the book). If you find a positive current when you bring the north pole of the magnet closer, what do you expect to find when you pull the magnet back? a positive current. a negative current. Zero current.
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